<sipproviders>
 <sipprovider>
  <owner>user</owner>
  <providername>blueface</providername>
  <providerusername>user</providerusername>
  <providerpassword>password</providerpassword>
  <providerserver>sip.blueface.ie</providerserver>
  <registerenabled>true</registerenabled>
  <registercontact>sip:user@10.0.0.100</registercontact>
 </sipprovider>
</sipproviders>